Basic SMS Notification Service

CoronaTracker's notifications service.

Curent state

• Transitioning EC2 instances on @Carter Klein's personal AWS profile to a secure CoronaTracker cloud environment for launch

Prerequisites

• Request access to the CoronaTracker database (approval dependent on prior commits to other CoronaTracker repositories) here
  • NOTE: When signing up for AWS, your username/password combination will be in the signup email you receive
• Create accounts for AWS, MongoDB, Twilio
  • NOTE: In AWS, ensure you're always located in N. Virginia (us-east-1)
• Ensure Go (we're on 1.13) is installed
• Set MONGODB_URI environment variable locally. This can be found in MongoDB Atlas -> Clusters -> Connect (in the box of the cluster your want) -> connect your application (see here)
• Set TWILIO_ACCOUNT_SID, TWILIO_AUTH_TOKEN environment variables locally. This can befound on the Twilio dashboard under "Account SID" and "Auth Token," respectively

Creating a new lambda function

• Create new AWS Lambda (we would prefer using Go 1.x runtime). Use the "Simple microservices permissions" policy
• Set the MONGODB_URI environment variable (TODO: encrypt in transit)
• Open permissions -> and attach the coronalert-lambda-policy to it
• Add this lambda to the CoronaTracker VPC, in the two private application subnets
• Create a representative test for the lambda for future use
• Attach the Coronalert API gateway as a trigger, with IAM security
• Remove the ANY type (see Actions button), and add requests specific to your lambda
• Deploy lambda (see Actions button) using the default deployment

NOTE: When building a Lambda function in Golang, follow these steps:

OSX

1. Build your main.go using GOOS=linux go build -o main
2. Zip the executable main using zip main.zip main
3. Upload main.zip to the lambda

Windows

1. Install build-lambda-zip using go get -u github.com/aws/aws-lambda-go/cmd/build-lambda-zip
2. Build your main.go using GOOS=linux go build -o main
3. Zip the executable main using ~/go/bin/build-lambda-zip.exe main (~/go/bin/ could be different depending on your file system layout)
4. Upload main.zip to the lambda

Golang is new to having native support by AWS Lambda, therefore you aren't yet able to edit lambdas inline.